1. In theory I'm on call day and night.
2. The nurse is on call tonight.
3. The doctor had been on call for 48 hours and was exhausted.
4. I'll be on call the night of the party.
5. She's a doctor, so she's often on call at the weekend.
6. Don't worry, there's a doctor on call 24 hours a day.
7. Battalion always had at least one maintenance ship on call for situations like ours.
8. The job entailed being on call twenty-four hours a day.
9. She was on call to open and shut the gates at any hour, in any weather.
10. As a doctor, you will be on call regularly at weekends.
11. Some colleges are now offering short courses on call centre techniques.
12. My job entailed being on call for shipping in the harbour and for this reason I was loath to live outside Stornoway.
13. The person on call made us a cup of tea - battered wives' homes are the greatest!
14. Holman was on call at any time although they had found no trace of the fog for two days now.